STK12C68-M

www.DataSheet4U.com STK12C68-M STK12C68-M CMOS nvSRAM 8K x 8 AutoStore™ Nonvolatile Static RAM MIL-STD-883 / SMD # 5962-94599 FEATURES 40, 45 and 55ns Access Times 15 mA ICC at 200ns Access Speed Automatic STORE to EEPROM on Power Down Hardware or Software initiated STORE to EEPROM DESCRIPTION The Simtek STK12C68-M is a fast static RAM (40, 45 and 55ns), with a nonvolatile EEPROM element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent nonvolatile data resides in EEPROM. Data transfers from the SRAM to the EEPROM (the STORE operation) take place automatically upon power down using charge stored in an external 100 µF capacitor. Transfers from the EEPROM to the SRAM (the RECALL operation) take place automatically on power up. Software sequences may also be used to initiate both STORE and RECALL operations. A STORE can also be initiated via a single pin. The STK12C68-M is available in the following packages: a 28-pin 300 mil ceramic DIP and 28-pad LCC. Automatic STORE Timing 100,000 STORE cycles to EEPROM 10 year data retention in EEPROM Automatic RECALL on Power Up Software initiated RECALL from EEPROM Unlimited RECALL cycles from EEPROM Single 5V±10% Operation Available in multiple standard packages LOGIC BLOCK DIAGRAM EEPROM ARRAY 256 x 256 A3 A4 ROW DECODER PIN CONFIGURATIONS VCAP VCCX VCAP A 12 A7 HSB A8 A9 A11 G A 10 E DQ 7 DQ 6 W 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27...